Clark County, Missouri
9 ZIP codes · Avg score 62/100 · Grade C · Updated 2026-06-03
Water safety in Clark County is uneven — some of its 9 ZIP codes meet standards cleanly while others carry documented violations.
How Clark County Compares
How Clark County Compares
Clark County scores 7 points below the Missouri state average (69/100) and 6 points below the national average (68/100).
Data: EPA SDWIS Last verified: 2026-06-03
ZIP Code Risk Map
Water Quality Map: Clark County, Missouri
Each dot represents a ZIP code. Color indicates water quality grade. Tap a dot for details.
Key Risk Factors
Health risk index: 16.1 (asthma 10.8%, diabetes 14.4%)
Estimated additional annual cost per homeowner: $710, driven primarily by water_lead
Infrastructure: 0.414% avg pipe failure probability, 67% of ZIPs at high risk
74.7% of homes built before 1978 (lead paint era)
County Health Indicators vs National Average
Black markers indicate national averages. Source: CDC PLACES, Census ACS.
Infrastructure Overview
Sources: Census ACS (housing age), EPA SDWIS (infrastructure risk model), state bridge inspection data.
Compound Risk Breakdown
Estimated additional annual cost per homeowner: $710
Bar widths proportional to share of total annual risk cost. Source: compound risk model (FEMA, EPA, USGS).
Housing Age Distribution
3,313 housing units in Clark County
Source: U.S. Census Bureau ACS B25034 (Year Structure Built).
Water Safety Affordability
How much it costs to fix water issues relative to home values in Clark County
Remediation costs are relatively manageable for most homeowners in Clark County, representing a small fraction of property value.
Remediation includes water filtration, lead abatement, radon mitigation, and flood protection where applicable. Source: Census ACS, EPA SDWIS.
Health Outcomes vs National Average
CDC PLACES data for Clark County residents
Black markers = national averages. Red = above national avg. Green = below. Source: CDC PLACES, Census ACS.
Water Systems with Most Violations
Top 5 systems in Clark County ranked by EPA violation count.
| # | Water System | Population | Violations |
|---|---|---|---|
| 1 | WAYLAND PWS | 533 | 6 |
| 2 | Clark County Cons Pwsd 1 | 7,140 | 2 |
| 3 | WYACONDA PWS | 227 | 1 |
| 4 | Kahoka Public Works Public Water System | 1,961 | 1 |
| 5 | SCOTLAND COUNTY CONS PWSD 1 | 3,360 | 0 |
All ZIP Codes in Clark County
9 ZIP codes tracked in Clark County.
| # | ZIP Code | City | Safety Score | Grade | Violations | Home Value |
|---|---|---|---|---|---|---|
| 1 | 63445 | Kahoka | 83 | B | 1 | $103K |
| 2 | 63474 | Wyaconda | 83 | B | 1 | $68K |
| 3 | 63472 | Wayland | 79 | B | 6 | — |
| 4 | 63432 | Arbela | 53 | D | 0 | $131K |
| 5 | 63453 | Luray | 53 | D | 0 | $250K |
| 6 | 63465 | Revere | 53 | D | 0 | — |
| 7 | 63466 | Saint Patrick | 53 | D | 0 | — |
| 8 | 63543 | Gorin | 53 | D | 0 | — |
| 9 | 63430 | Alexandria | 50 | D | 0 | $151K |
Recommended Buyer Guides for Clark County
Editorial-only picks, screened against the EPA detections on file.
- Best Lead Paint Test Kits — 74.7% of homes built before 1978
Deep Dive Reports
Detailed analysis for Clark County, Missouri
Overview
Clark County in Missouri covers 9 ZIP codes with an average Home Safety Score of C (62/100).
3 of 9 ZIP codes have recorded EPA violations. All violations are monitoring/reporting type.
← Back to Missouri water quality report
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Home values: U.S. Census Bureau ACS (median estimates by ZCTA)
Updated daily.